CASCACascade Atlas

Evidence dossier

CVE-2017-12238

CVE-2017-12238

51.1–74.1Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

A vulnerability in the Virtual Private LAN Service (VPLS) code of Cisco IOS 15.0 through 15.4 for Cisco Catalyst 6800 Series Switches could allow an unauthenticated, adjacent attacker to cause a C6800-16P10G or C6800-16P10G-XL type line card to crash, resulting in a denial of service (DoS) condition. The vulnerability is due to a memory management issue in the affected software. An attacker could exploit this vulnerability by creating a large number of VPLS-generated MAC entries in the MAC address table of an affected device. A successful exploit could allow the attacker to cause a C6800-16P10G or C6800-16P10G-XL type line card to crash, resulting in a DoS condition. This vulnerability affects Cisco Catalyst 6800 Series Switches that are running a vulnerable release of Cisco IOS Software and have a Cisco C6800-16P10G or C6800-16P10G-XL line card in use with Supervisor Engine 6T. To be vulnerable, the device must also be configured with VPLS and the C6800-16P10G or C6800-16P10G-XL line card needs to be the core-facing MPLS interfaces. Cisco Bug IDs: CSCva61927.

State
PUBLISHED
Published
Sep 28, 2017
Updated
Jan 12, 2026
Evidence coverage
72%
CISA KEVCatalog member

Apply updates per vendor instructions.

FIRST EPSS2.03%

2026-07-18 · v2026.06.15 · percentile 78.9%

Source stateConflict visible

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

ciscooriginal assertion
container

A vulnerability in the Virtual Private LAN Service (VPLS) code of Cisco IOS 15.0 through 15.4 for Cisco Catalyst 6800 Series Switches could allow an unauthenticated, adjacent attacker to cause a C6800-16P10G or C6800-16P10G-XL type line card to crash, resulting in a denial of service (DoS) condition. The vulnerability is due to a memory management issue in the affected software. An attacker could exploit this vulnerability by creating a large number of VPLS-generated MAC entries in the MAC address table of an affected device. A successful exploit could allow the attacker to cause a C6800-16P10G or C6800-16P10G-XL type line card to crash, resulting in a DoS condition. This vulnerability affects Cisco Catalyst 6800 Series Switches that are running a vulnerable release of Cisco IOS Software and have a Cisco C6800-16P10G or C6800-16P10G-XL line card in use with Supervisor Engine 6T. To be vulnerable, the device must also be configured with VPLS and the C6800-16P10G or C6800-16P10G-XL line card needs to be the core-facing MPLS interfaces. Cisco Bug IDs: CSCva61927.

CVEderivative copy
container

CVE Program Container

CISA KEVoriginal assertion
observed_exploitation

Cisco Catalyst 6800 Series Switches VPLS Denial-of-Service Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.020340000000; percentile 0.789110000000

Applicability

Cited product scope

Trace impact →
n/aCisco IOS
[{"status": "affected", "version": "Cisco IOS"}]unknown
Unknown vendorUnknown product
cpe:2.3:h:cisco:c6800-16p10g:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:c6800-16p10g-xl:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6000:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6000_ws-svc-nam-1:2.2\(1a\):*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6000_ws-svc-nam-1:3.1\(1a\):*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6000_ws-svc-nam-2:2.2\(1a\):*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6000_ws-svc-nam-2:3.1\(1a\):*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6000_ws-x6380-nam:2.1\(2\):*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6000_ws-x6380-nam:3.1\(1a\):*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6500:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6500-e:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6500_ws-svc-nam-1:2.2\(1a\):*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6500_ws-svc-nam-1:3.1\(1a\):*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6500_ws-svc-nam-2:2.2\(1a\):*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6500_ws-svc-nam-2:3.1\(1a\):*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6500_ws-x6380-nam:2.1\(2\):*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6500_ws-x6380-nam:3.1\(1a\):*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6503-e:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6504-e:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6506-e:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6509-e:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6509-neb-a:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6509-v-e:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6513:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:cisco:catalyst_6513-e:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*; start including 15.0; end including 15.4supported

Assessments

CVSS by origin

6.5
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.3
nvd@nist.govCVSS 2.0 · role PrimaryAV:A/AC:L/Au:N/C:N/I:N/A:P
6.5
134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS 3.1 · role SecondaryCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.5
CISA-ADPCVSS 3.1 · role unknownCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.